const fp = require('lodash/fp');

const cars = [
  {name: 'Ferraxd FF', horsepower: 660, dollar_value: 700000, in_stock: true},
  {name: 'Spyker C12 Zagato', horsepower: 650, dollar_value: 648000, in_stock: false},
  {name: 'Jaguar XKR-S', horsepower: 550, dollar_value: 132000, in_stock: false},
  {name: 'Audi R8', horsepower: 525, dollar_value: 114200, in_stock: false},
  {name: 'Aston Martin-One77', horsepower: 750, dollar_value: 185000, in_stock: true},
  {name: 'Pagani Huayra', horsepower: 700, dollar_value: 130000, in_stock: false},
]

//practice 01
let isLastInStock = fp.flowRight(fp.prop('in_stock'), fp.last);
console.log(isLastInStock(cars));

let getFirstName = fp.flowRight(fp.prop("name"), fp.first);
console.log(getFirstName(cars));

//practice 03
let _average = function (xs) {
  return fp.reduce(fp.add, 0, xs);
}

let averageDollarValue = fp.flowRight(_average, fp.map(item => item.dollar_value));
console.log(averageDollarValue(cars));

//practice 04
let _underscore = fp.replace(/\W+/g,'_');
let sanitizeNames = fp.flowRight(_underscore,fp.map(item=>item.name));
console.log(sanitizeNames(cars));